Molar Volume of a Gas Calculator
Works out how much space a mole of gas takes up.
Molar volume
— L/mol
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The formula
molar volume = R × T ÷ P
T is in kelvin. Volume per mole depends only on temperature and pressure for an ideal gas.
What to watch out for
Older texts define standard conditions as 0 °C and 1 atm. IUPAC now uses 0 °C and 100 kPa. Check which one a question means.
Frequently Asked Questions
What is the molar volume at STP?
22.41 L/mol at 0 °C and 1 atm, or 22.71 L/mol at 0 °C and 100 kPa.
What is the molar volume at room temperature?
24.47 L/mol at 25 °C and 1 atm.